Abrasion-Resistant Nonmarking Floor Lock 5 5/8 in For Caster Mounting Height 5 5/8 in Floor Lock Retracted Height 6 3/4 in Floor Lock Extended Height 5 in For Wheel Dia B Mounting Plate Bolt Hole Pattern 3-15/16 in x 4-1/2 in Mounting Plate Size Steel 2-9/16 in x 3-3/16 in Inside Bolt Hole Spacing 3-1/16 in x 3-11/16 in Outside Bolt Hole Spacing